On Wed, 18 Jul 2007 11:54:46 -0400, in
bit.listserv.ibm-main
(Message-ID:<[EMAIL PROTECTED]>) "pdc"
<[EMAIL PROTECTED]> wrote:
just a quick question. (double posted to TSOREXX)
Is there a difference, performance or otherwise, between
the following two
commands?
On the more general REXX newsgroup, we've seen that
the answer to any performance question depends on what REXX
you're running. (You've posted to IBM-Main, but we still
don't know MVS, VSE, or VM, and compiled, semi-compiled or
interpreted.)
The general answer to performance questions
is: "Create a huge loop, and find out."
Just out of curiosity, I ran tests on my home PC
(Win2k w/ Regina REXX). I was going to post my results,
but when I switched the order of the loops, the results
swapped, too. To my mind, that means they're equal in
machine efficiency, and (to me) the concat form is much
easier to read and less likely to cause a problem. (Also,
someone noted the problem of concatenating variable named
'x' with a quoted string by abutting them.)
--
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